<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息"
                type="info"
                center
                show-icon
                :closable="false">
      </el-alert>
      <!-- 进度条 -->
      <el-steps :space="200"
                :active="activeIndex - 0"
                align-center
                finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form :model="addForm"
               :rules="addFormRules"
               ref="addFormRef"
               label-width="100px"
               label-position='top'>
        <el-tabs tab-position="left"
                 v-model="activeIndex"
                 :before-leave="beforeTabLeave"
                 @tab-click="tabClicked">
          <el-tab-pane label="基本信息"
                       name="0">
            <el-form-item label="商品名称"
                          prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格"
                          prop="goods_price">
              <el-input v-model="addForm.goods_price"
                        type='number'></el-input>
            </el-form-item>
            <el-form-item label="商品重量"
                          prop="goods_weight">
              <el-input v-model="addForm.goods_weight"
                        type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量"
                          prop="goods_number">
              <el-input v-model="addForm.goods_number"
                        type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类"
                          prop="goods_cat">
              <el-cascader expand-trigger="hover"
                           :options="cateList"
                           :props="cateProps"
                           v-model="addForm.goods_cat"
                           @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数"
                       name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item :label="item.attr_name"
                          v-for="item in manyTableData"
                          :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(item1,i) in item.attr_vals"
                             :key="i"
                             :label="item1"
                             border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性"
                       name="2">
            <el-form-item :label="item.attr_name"
                          v-for="item in onlyTableData"
                          :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片"
                       name="3">
            <!-- action表示图片要上传到的后台api地址； -->
            <el-upload class="upload-demo"
                       action="https://jsonplaceholder.typicode.com/posts/"
                       :on-preview="handlePreview"
                       :on-remove="handleRemove"
                       :on-success="handleSuccess"
                       list-type="picture">
              <el-button size="small"
                         type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容"
                       name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor ref="myQuillEditor"
                          v-model="addForm.goods_introduce"
                          :options="editorOption"
                          @blur="onEditorBlur($event)"
                          @focus="onEditorFocus($event)"
                          @ready="onEditorReady($event)" />
            <el-button type="primary"
                       class="btnAdd"
                       @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览"
               :visible.sync="previewVisible"
               width="50%"
               :before-close="handleClose">
      <img :src="previewPath"
           alt=""
           class="previewImg">
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'
export default {

  data () {
    return {
      activeIndex: '0',
      // 添加商品的数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选中商品分类', trigger: 'blur' }
        ]
      },
      cateList: [{
        cat_id: 1,
        cat_name: '大家电',
        children: [
          {
            cat_id: 11,
            cat_name: '电视',
            children: [{
              cat_id: 111,
              cat_name: '彩电'
            }, {
              cat_id: 112,
              cat_name: '小彩电'
            }]
          }
        ]
      }, {
        cat_id: 2,
        cat_name: '测试1',
        children: [
          {
            cat_id: 21,
            cat_name: '黄金珠宝'
          },
          {
            cat_id: 22,
            cat_name: '首饰配饰'
          },
          {
            cat_id: 23,
            cat_name: '品牌墙'
          }
        ]
      }],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数据
      manyTableData: [{
        attr_name: '动态',
        attr_id: 1,
        attr_vals: ['你好', 'nihao', 'hello', 'nice'],
        inputVisible: false,
        inputValue: ''
      }, {
        attr_name: '颜色',
        attr_id: 2,
        attr_vals: ['红色', '黄色'],
        inputVisible: false,
        inputValue: ''
      }],
      // 静态列表数据
      onlyTableData: [{
        attr_name: '静态',
        attr_id: 1,
        attr_vals: ['你好', 'nihao', 'hello', 'nice']
      }, {
        attr_name: '颜色',
        attr_id: 2,
        attr_vals: ['红色', '绿色', '黄色', '字色']
      }, {
        attr_name: '形状',
        attr_id: 3,
        attr_vals: ['圆', '方', '长方形', '三角形']
      }],
      // 上传图片的url地址
      upload: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的header请求头设置
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false

    }
  },
  created () {
    // this.getCateList()
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败')
      }
      this.$message.success('获取数据成功')
      this.cateList = res.data
    },
    // 级联选择器选中项变化触发
    handleChange () {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave (activeName, oldActiveName) {
      // activeName即将进入的标签，oldActiveName即将离开的标签
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked () {
      // console.log(this.activeIndex)
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        /* const { data: res } = await this.$http.get(`categories/${this.cateId}`, {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        this.$message.success('获取动态参数列表成功')

        res.data.forEach(item => {
          item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data */
      } else if (this.activeIndex === '2') {
        /* const { data: res } = await this.$http.get(`categories/${this.cateId}`, {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        this.$message.success('获取动态参数列表成功')

        res.data.forEach(item => {
          item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.onlyTableData = res.data */
      }
    },
    // 处理图片预览效果
    handlePreview (file) {
      // this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove (file) {
      // 1.获取将要移除的图片临时路径
      const filePath = file.response.data.tmp_path
      // 2.从pics数组中找到图片对应的索引值
      const i = this.addForm.pics.findindex(item => item.pic === filePath)
      // 3.调用数组方法splice，移除图片信息
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传成功的事件
    handleSuccess (response) {
      // 1.先拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2.将图片信息对象push到数据
      this.addForm.pics.push(picInfo)
    },
    // 添加商品
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // lodash cloneDeep(obj)深拷贝
        const form = _.cloneDeep(this.addForm)
        this.addForm.goods_cat = form.goods_cat.join(',')
        // 处理动态参数和静态属性
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs

        // 发起请求添加商品，商品的名称必需是唯一的
        // const { data: res } = await this.$http.post('goods', form)
        // if (res.meta.status !== 201) {
        //   return this.$message.error('添加商品失败')
        // }
        this.$message.success('添加商品成功')
        this.$router.push('/shangpinList')
      })
    }
  }
}
</script>
<style scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
